The 12-person jury found Antonio Livingston guilty of all four charges against him: first-degree murder, felony murder, assault with intent to rob and first-degree home invasion.

Livingston and John Aguilar, who is scheduled to go to trial in April, were charged in the beating death of Medema, the long-time owner of The Emporium antiques store in downtown Kalamazoo. Investigators have said Livingston and Aguilar went to Medema's house to rob him on Aug. 10 and during the robbery beat him to death with a baseball bat.

The prosecution argued that, even if Livingston didn't swing the bat, he is guilty for aiding and abetting in the crimes.

While Linda Livingston concedes that her son was at Medema's Oakland Drive house the night he was killed, she said Aguilar is the one to blame for the murder. She said her son would never want to kill another person.

The day after Medema was killed, Aguilar and Livingston went to Detroit. Linda Livingston said her son called her that day and he told her Aguilar would not take him back to Kalamazoo. The next day, she said, she went to Aguilar's house to look for her son, who had been gone since Friday.

Linda Livingston said her son and other family members feared Aguilar. "He was afraid of him because I was, we all were," she said.

Linda Livingston and her children came to Kalamazoo after being displaced by Hurricane Katrina, according to Antonio Livingston's sister, Erica Livingston. Antonio Livingston lived in different areas of the country, including Ohio, with family members, and also spent some time in a juvenile facility in LaPorte, Ind.

Erica Livingston said her brother planned to enroll at Western Michigan University, which she currently attends.

Antonio Livingston will be sentenced March 25 and faces a life prison term without chance of parole, the mandatory punishment in Michigan for felony murder and first-degree murder.